Vulnerability · Published Jul 12, 2026 · Assigned by VulnCheck

CVE-2026-61875luci-app-upnp Stored XSS via UPnP Port Mapping Description

High 8.8

In plain English

A high-severity cross-site scripting in luci from openwrt. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.4%top 70.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

luci-app-upnp contains a stored cross-site scripting vulnerability that allows unauthenticated LAN clients to inject JavaScript via UPnP IGD AddPortMapping SOAP requests. Attackers can send malicious HTML in the NewPortMappingDescription field, which miniupnpd stores and luci-app-upnp renders without output encoding, executing the payload when administrators view the UPnP or Status pages.

Affected products (as reported)

Vendor	Product	Versions
openwrt	luci	0 – before 24.10.825.12.0 – before 25.12.5

Weakness: CWE-79 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-8v49-6387-7f89) vendor-advisory
VulnCheck Advisory: luci-app-upnp Stored XSS via UPnP Port Mapping Description third-party-advisory